In August, Niteroi typically sees daytime highs of 26.0°C and overnight lows around 16.8°C. Compared to the annual average high of 27.8°C, August runs -1.8°C.
August in Niteroi averages a daytime high of 26.0°C and an overnight low of 16.8°C.
August runs -1.8°C compared to Niteroi's annual average high of 27.8°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 26.0°C and cooler evenings around 16.8°C.